Given some data
dat, we would like to generate a predictor function. Therefore we use
pdata = Map[#[] -> #[] &, dat]; p = Predict[pdata, Method -> "NeuralNetwork", PerformanceGoal -> "Quality"];
If one tries to take the derivative of
p[x] via (here as an example at 2.)
ND[p[x], x, 2.]
PredictorFunction::bfttype: "Invalid argument x. feature1 is a Numerical feature. How can one perform a derivation of the PredictorFunction?